Rotary vibrating drill



Sept. 5, 1933. F. x, sTRoBEL 1,925,289

ROTARY VIBRATING DRILL 1 Filed Dec. 27, 1932 Wg Z l Patented Sept. 5, 1933 Afrerrr omes- RQTARY WBRATING DRILL Frank X. Strobel, Milwaukee, Wis.

Application December 27, v1932 serial No. 648,967

v 2 Claims.

This invention appertains to tools and more particularly to a novel device for imparting a reciprocatory and rotary motion to a drill or similar appliance. A Y

In drills (particularly of the hand power type), it is customary to provide a rotary motion only to the bit. This is not conducive to bring about the best and quickest results. e

It is therefore a prime object of my invention l to provide novel means wherein a reciprocatory motion can be imparted to the drill or other tool simultaneously with the rotation thereof whereby the Work actedupon will be subjected both to impactand to a feeding movement, which b lwill bring aboutY the kdesired.satisfactory results. A further important object of my invention is the provision of novel means for arranging the hammer and anvil within the housing or casing of theY tool with novel means for raising and quickly lowering the hammer incident to the rotation of the anvil with the bit, whereby the bit will be subjected both to impact and to a rotary movement.

A still further object of my invention is to provide novel means for arranging the parts of the device whereby a compact and durable structure will be had and whereby the device can be quickly taken apart for the purpose of repairs-and the like.

A still further object of my invention is to provide a device of the above character, which will be durable and eicient in use, one that will be simple and easy to manufacture and one which can be placed upon the market at a reasonable cost.

With these and other objects in view, the invention consists in the novel arrangement, construction and formation of parts, as will be hereinafter more fully described, claimed and illus- Y trated in the accompanying drawing, in which:

Figure 1 is a longitudinal section through my improved device showing the hammer in its lowered position.

Figure 2 is a side elevation of the inner rotatable housing with the cam sleeve thereon.

Figure 3 is a similar View with the cam sleeve removed.

Figure 4 is a transverse section through my improved device taken on the line 4-4 of Figure 1.

Figure 5 is a transverse section through my im proved device taken on the line 5-5 of Figure l. Referring to the drawing in detail, wherein similar reference characters designate the corresponding parts throughout the several views, the

(Cl. Z-41) letter A generally indicates my improved device, which comprises a ltubular housing or casing'l, the llower end of which is left open and the upper end of which Vis provided with a top wall 11. This top wall l1 is provided with an enlarged axial opening 12, for a purpose, which will be later set forth.

v Secured to 'the tubular housing or casing 10 at a' pointinterinediate its length is a support 13 which can in the nature of a handle where the device is utilized in connection with hand tools, or in 'the nature or a rigid bracket where the device is utilized as a stationary power driven device.

Arranged within the lower end of v'the housing 10 is a cam sleeve 14. This cam sleeve can be rigidly secured in place in any desired way, such as by the use of screws l5 which extend through the tubular housing and into the said sleeve. It is to be noted 'that the upper end of the sleeve 14 is provided with .a plurality of equi-distantly spaced cam or ratchet teeth 16. Each of 'these teeth are provided with inclined leading faces 17 at one side and abrupt vertical faces 18 at the other side.

Rotatably received within the tubular housing 10 and the cam sleeve 14 is the hollow drive sleeve or shaft 19. This hollow drive shaft or sleeve 19 extends entirely through the housing 10 and its upper end has secured thereto or formed thereon the spindle 20 which extends exteriorly of the housing 1 0 through 'the opening 12. This spindle 20 can be rotated in any desired way, such as by the use of a conventional electric hand drill or by the use of a crank or brace 21. Formed within the hollow shaft or drive sleeve 19 intermediate its ends are a pair of diarnetrically opposed longitudinally extending slots 22. These slots are preferably angled slightly away from the longitudinal axis of the hollow drive shaft or sleeve for a purpose, which will also be hereinafter more fully set forth. n

Received within the lower end of the hollow sleeve or drive shaft 19 is the work shank 23 which can carry any preferred type of chuck 24 for receiving the desired tool. Placed around the upper end of the shank 23 is an impact sleeve or anvil 25 and this anvil 25 is connected with the shank 23 by means of a diametrically extending pin 26. The terminals of the pin 26 are received in relatively short slots 27 formed in the hollow drive shaft or sleeve 19.

Slidably mounted within the hollow shaft or sleeve 19 above the shank 23 and the impact sleeve or anvil 25 is a reciprocatory hammer 28. The

hammer 28 is normally urged toward the anvil and shank by means of a relatively heavy expansion coil spring 29. This spring is confined within the hollow shaft between the hammer 28 and the end wall of the shaft or sleeve 19. Extending diametrically through the hammer 28 is a pin 30 and the terminals of this pin extend through the slots 22 formed in the hollow shaft and rest .upon the cam or ratchet teeth 16. The end edges of the pin 30 are preferably rounded so as to facilitate the slidingv movement thereof over the ratchet or cam teeth.

In use of my improved device, 'the handle `or bracket 13 is held stationary and rotary motion ff is imparted to the shaft 19 through the use of the handle 21 or the electric hand drill. This rotary motion will be in turn imparted to dinev chuck 24 through the medium of the pin 26 and the shank 23.

During rotation of the hollow shaft, the hammer 28 will be carried therewith and as the ends of the pin 30 ride up the inclined faces 17 on the teeth 16, the hammer will be raised against .the influence of the spring 29. As the ends of 4the 1 pin ride of the teeth 16, the hammer will be forcibly thrown downward by the spring .and thus, deliver a forcible blow to .the anvil'and shank 23. This motion continues rapidly during the rotation of the shaft and consequently during rotary movement of the bit, drive impact is exerted thereon.

From the foregoing description, it can be seen that I have provided an exceptionally simple and durable type of drill, in which a combination rotary and reciprocatory movement is imparted t0 the bit.

Changes in details may be made without de-y parting from the spirit or the scope of this invention, but what I claim as new is:-

1. In a tool, a stationary casing, a cam sleeve secured in the casing having a plurality of equdistantly spaced cam teeth, a hollow rotatable shaft mounted within the casing and cam sleeve, a tool shank connected with the shaft for rotary movement therewith and longitudinal movement thereof, a spring-pressed hammer slidably mounted within the hollow shaft, and a cross pin connected with the hammer having its terminals engaging the cam teeth.

2. In a tool, a casing, means for holding the casing against movement, a cam sleeve rigidly secured to the casing having a plurality of cam teeth en its inner end, a hollow shaft rotatably mounted within the casing and the cam sleeve, a drive spindle on the shaft extending exteriorly of the casing, means for rotating the spindle, a tool shank, an anvil sleeve surrounding the shank and arranged within the hollow shaft, said hollow shaft having short slots formed therein, a cross pin connecting the shank and anvil sleeve together and having its terminals received within the slots, a hammer slidably mounted within the hollow shaft above the shank and anvil sleeve, spring means normally urging the hammer toward the shank and anvil sleeve, said hollow shaft being provided with elongated longitudif 7 nally extending notches arranged at an angle to the longitudinal axis thereof, and an operating cross pin extending through the hammer and through the last mentioned slots with its terminals in engagement with the cam teeth.

FRANK X, STROBEL. 

